Vulnerability identifier: #VU20477

Vulnerability risk: Medium

CVSSv3.1: 5.3 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-15515

CWE-ID: CWE-200

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Discourse
Web applications / Forum & blogging software

Vendor: Civilized Discourse Construction Kit, Inc.

Description

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to software sends CSRF token in the query string. A remote attacker can gain access to the token via HTTP Referer header, bypass implemented CSRF protection mechanisms and perform CSRF attack

Mitigation
Install update from vendor's website.

Vulnerable software versions

Discourse: 2.3.2

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External links
http://github.com/discourse/discourse/pull/8026

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.